Which of the following statements relative to book (perpetual) inventory systems Is false? a. Use of book inventory system allows a retailer to know at all times the value of inventory on hand without having to take a physical inventory. b. Book inventory systems can be maintained on either a retail dollar or a cost dollar basis. c. Cost dollar control is used more in retailing than retail dollar control. d. A cost dollar control system is used when merchandise is of an unusually high unit value and there are relatively few transactions. e. When using a cost system, it is not possible to record additional markups and reductions because all the figures in the cost system are in cost dollars.